The Volunteer Advocacy Project (VAP) is a 36-hour advocacy training program for individuals who want to become special education advocates. You can find different iterations of the VAP at these websites:
Vanderbilt Kennedy Center, Nashville, Tennessee
https://vkc.mc.vanderbilt.edu/vkc/services/project/volunteer-advocacy/
Family Resource Center on Disabilities, Chicago, Illinois
https://frcd.org/tag/special-education-advocacy/
Community Inclusion and Development Alliance (CIDA), Bayside, New York
https://cidainfo.com/volunteer-advocacy-project-vap/
Human Development Institute, Kentuck